refactor pybullet/gym to allow instantiating environments directly from a pybullet install:

work-in-progress (need to add missing data files, fix paths etc)

example:

pip install pybullet
pip install gym

python
import gym
import pybullet
import pybullet_envs
env = gym.make("HumanoidBulletEnv-v0")

MANIFEST.in

@@ -5,6 +5,8 @@ recursive-include Extras *.h
 recursive-include Extras *.hpp
 recursive-include src *.h
 recursive-include src *.hpp
+recursive-include data *.*
+recursive-include examples/pybullet/gym *.*
 include examples/ThirdPartyLibs/enet/unix.c
 include examples/OpenGLWindow/X11OpenGLWindow.cpp
 include examples/ThirdPartyLibs/Glew/glew.c